Two-cycle engine, combined pump, and motor cylinder



May 30, 1950 c. B. suEs 2,509,538

TWO-CYCLE ENGINE, COMBINED PUMP, AND MOTOR CYLINDER Original Filed Dec. 18, 1944- 6 She'ets-Sheet 1 4 I "-162 93- 42 39 175 f v 73 75 J1 I66 0 I6 35 a 5 4 31 58 j; 4; 14s

57 3i I53 32 3:} 176 I47 J 4 14a 15a 3 6 I90 INVENTOR. CH EL B Sues .A rroxweys May 30, 1950 c. B. suss 2,509,533

TWO-CYCLE ENGINE, COMBINED PUMP, AND MOTOR CYLINDER Original Filed Dec. 18, 1944 6 Sheets-Sheet 2 J g-4. FJgJj. I40 139 50 I38 5 137 1 85 I25 I41 I44 124 I 74 IN VEN TOR.

CARL BJSUES A 1-7-0 R NEVS ay m, 1950 a. B. suEs 5 15 TWO-CYCLE ENGINE, COMBINED PUMP, AND MOTOR CYLINDER Original Filed Dec. 18, 1944 6 Sheets-Sheet 4 y 1950 c. B. SUES 2,509,538

TWO-CYCLE ENGINE, COMBINED PUMP, AND MOTOR CYLINDER Original FiledDec. 18, 1944 6 Sheets-Sheet 5 INVENTOR. CARL B- Sues HTT'OENEVJ' v 2,509,538 TWO-CYCLE ENGINE, COMBINED ump; ANDMOTOR CYLINDER Original Filed Dec. 18. 1944 V C. B. SUES 6 Sheefs-Sheet 7 May 30, 1950 (Am B. .5 05s Patented May 30, 1950 TWO-CYCLE ENGINE, COMBINED PUlVlP, AND MOTOR CYLINDER Carl B. Sues, Lancaster, CaliL; Thelma C. Sues administratrix of the estate of said Carl B.

Sues, deceased Original application December 18, 1944, Serial No. 568,619, now Patent No. 2,447,041, dated August 17. 1948. Divided and this application May 24,

1948, Serial No. 28,854

23 Claims. 1

This invention relates to internal combustion engines, and more especially to a Diesel type engine having compression ignition or explosion.

This application is a division of my copending application entitled Two cycle engine, combined pump and motor cylinder. Serial No. 568,619, filed December 18, 1944, now United States Letters Patent No. 2,447,041, issued August 17, 1948.

An object of the invention is to provide an internal combustion engine of the type under consideration having reduced weight per unit of horse-power made possible by simplified construction wherein the supply of air available for combustion is greatly concentrated.

Another object of the invention is to provide in an engine of the character described higher engine that would be necessary to produce its graded horse-power output.

An additional object is to provide in an engine of the character described improved or increased efficiency due to more effective cooling of the engine parts wherein the heat from these parts is utilized in the fuel combustion processes.

A further object of the invention is to provide in an engine of the character described means and a method of cooling which does not require the use of water jackets and wherein the engine is substantially and internally air cooled thus permitting lower weight per unit of horse-power.

A further object of the invention is to provide an engine of the character described adapted for operation in reduced temperatures, such as aircraft at high altitude, wherein efficiency is maintained because of the utilization of the principle of internal air cooling.

Another object of the invention is the provision of an engine in which the structure issimplified by the substantial elimination of a cam shaft due to the operation of the engine as a twocycle type wherein the only valve is an exhaust valve actuated directl from the crank shaft.

A further object is the provision of an engine of the character described wherein maximum superchargepressure may be maintained even at low speeds, which function is impossible with ordinary turbo-supercharging auxiliaries, and results in a proportionate torque curve over all speed ranges.

Another object is the provision in an engine of the character described of a novel hydraulic control system which provides automatic regulation (Cl. 123-65 all.

of the supercharge pressure in respect to the fuel 56 injection pressure which is directly proportional to the engine load.

A further object of the invention is to provide a novel lubricating means which include a centrifugal unloader which serves as a hydraulic speed determinator and also serves to increase the lubrieating pressure and flow as the speed increases.

Still other objects of my invention include providing such means that are positive in operation, convenient in use, economical of manufacture, relatively simple, and of general superiority and serviceability.

The invention also comprises novel details of construction and novel combinations and arrangements of parts, which will more fully appear in the course of the following description. However, the drawing merely shows and the following description merely describes embodiments of the present invention, which is given. by wa of illustration or example only.

In the drawings, like reference characters designate similar parts in the several views.

Fig. 1 is a top view, partly broken away, of the engine comprising my invention.

Fig. 2 is a side elevation view, partly broken away and partly in section, of the same.

Fig. 3 is a fragmentary view, in section, taken along the line 3-3 of Fig. 2 showing the supercharge pressure dampening valve.

Fig. 4 is an enlarged view, in section, taken along the line 4-4 of Fig. 6 showing theinlet and exhaust valve housing structure and associated parts.

Fig. 5 is a sectional view of the same taken along the line 5-5 of Fig. 4.

Fig. 6 is a sectional elevation through the engine, the section being taken through one of the cylinders.

Fig. 7 is a fragmentary sectional view taken along the line 'l--'! of Fig. 5.

Fig. 8 is an enlarged fragmentary section taken along the line 8-4! of Fig. 6 and showing the upper piston.

Fig. 9 is a view similar to Fig. 4 showing the exhaust valve in closed position.

Fig. 10 is a View similar to Fig. 6 showing a piston positioned after a movement of the crank shaft of about 30 from that of Fig. 6.

Fig. 11 is a sectional view taken along the line Hll of Fig. 13.

Fig. 2 is a fragmentary transverse section showing one of the apertures in the valve plate seen in Figs. 8, 11 and 13.

Fig. 13 is a view similar to Fig. 8 showing the accuses i piston and valve positions after the piston has been raised from the position shown in Fig. ll.

Fig. la is a cross section view of one of the connecting rods.

Fig. is a view similar to Fig. 4 showing the fuel control check valve in. closed position.

Fig. 16 is a view similar to Fig. 15 showing exhaust valve in partially open position.

Fig. 17 is a view similar to Fig. 16 showing the pistons at the extreme upper end of the SEl'OlZ' his. 17s is a detail of a check. valve ccnstruc= tlon.

Fig. 1c is a view similar to Fig. 17 showing the pistons nearly at the lower end of their strol;

i9 is a view similar to 1 showing he hydraulic super-charged pressure control sys'em, partly section.

20 is a fragmentary view, in sectional e e= vatlon showing the exhaust valve rocker push rod Fig. 21 is a fragmentary elevation view sh oi the idler sprockets for the exhaust control ShOWll Fig. 22 is a sectional view taken along the oi 2.

23 is a fragmentary iew, partly in sectlc showing the centrifugal unloads? the is eating oil pressure.

Fig. 24 is an enlarged sectional view along the line B l-2G of 25 is sectional view talreii along the of 26 is a vertical sectional view injection. pressure regulator adap connected. of the regulator shown in 27 and 28,. or the regulator shovm in Fig.

I 27 is an elevation view, in section, aulic control motor regulator.

28 is an elevation view, partly broken away, of the hydraulic regulator, shown is 2?, as seen at right angles thereto.

Fig. 29 is an elevation view, in central section, of a modified form of hydraulic control.

Referring more particularly to the drawings, show my engine having a lower cylinder housing which provides bearings for a crank 33 to which are suitably secured a plurality of connecting rods 36. The engine shown has four cylinders, and it will be understood that reference herein to a cylinder or part thereof is duplicate in all four cylinders except where otherwise stated. It is to be understood, however, that an engine having two or more cylinders may be constructed in accordance with the present engine. A lower piston 35 is connected to each connecting rod 34 and is reclprocable in a lower cylinder and precompression chamber as. A plate 3? extends across the top of the cylinders so and supports an upper cylinder base 383, one for each cylinder. Each cylinder 36 has an enlarged lower portion 36a to which is secured a crank case or pan .39 individual to each cylinder. An upper cylinder 40 is positioned on each base as in which is reciprocable an upper or main piston member M. A piston rod member 42 is suitably secured to piston member 4| and is also secured as by threaded connection to lower piston $5, from which construction it will be clear that pistons es and M reciprocate as a. unit, piston rod member 42 passing through a central ring sealed opening in base 38 and also plate 31.. A plate 43 extends across upper cylinders 40 and secures walls 44 on the upper portions of cylinders 36, which walls form a supercharge pressure receiver 45. Walls 46 are extended around the sides and end of lower cylinthe J number of per downward stroke or "i down on ports A cylinder head bloclz: provided for each iii? * passages in;

ders 36 and provide an air inlet chamber 4! in communication with a duct 48 at the rear of the engine, which duct is in communication with an air inlet manifold to, a suitable housing for which is provided. Eylinder portion 36a and crank case 39 form a precompression chamber 5 l there being ports E2 having checl: valves 52a in cylinder portion 35. an exhaust manifold 53 is provided outside of inlet manifold 56. Cylinder portions 36a are provided with ports 54 having check valves therefor normally retained in closed position by springs 5%.

Lower piston is provided with a passage 51 communicating with a core 53 in piston rod 42. Piston member ll has a lzuccker pin 59 on the top thereof which uuseats a valve member for the combustion chamber; as will he more fully described hereinafter. The upper: end of piston rod is formed with a piston portion which is suitably secured to piston ii and has compression sealing rings ill engaging the inner wall of cylinder to. The upper end of pistol). rod 42 is formed with a valve seat a valve 53 and a plurality of ports comiasu .icate with vertical stop. member and Avalve so is located in upper p rtiou or" ach passage 6i) and when. seate closes the passage, the valves F56 being provided with bosses on the upper portion thereof to provide spacing het eeu the S'l havmi annulus secured l and h .s

'i'] Cyli :ler base men? '11 a plurality of webs ed to be adapted to close to 2-? and a similar hases 33. On the plus is push valve 415, and an annular valve reciprocahle in chamber a plurality of ports id ts in cy the pi upper cylinder each hlcci; it has an openlil' in the thereof, and pair of laterally extending exhaust passages l". Each upper cylinder has a top opening it forming a valve seat for exhaust valve sleeve 35 which has a lower annular valv seating edge iii adapted to seat, when closed, on valve seat 1s.

An inlet valve housing or is Secured as by bolts 35 to cylinder head block it, and a pair of laterally extending leaf springs 865 are secured on block is held by housing at and bolts 85. Springs so resiliently support a bearing pin 81 which pivotally carries a rocker arm 88, one end of which is bifurcated and carries bearing pins which pivotal-1y support valve sleeve 80. The other end of rocker arm 88 is threaded for a bearing stud iii which has a lock nut 92 thereon, and the lower end of stud 9| is rounded for engagement in the dished end of a push rod 93 which has a shouldered portion 96. Push rod 93 extends through a. threaded sleeve 95. Sleeve 95 has threaded eneasement in a collar 96 suitabl supported in the top of cylinder block 16, and a cam roller 91 is secured at the lower end of push rod 93 and rides on a cam 98 on crank shaft 33, ther being provided a. step 99 such that the radius of cam 98 increases gradually from the step 99 during the rotation of the cam.

Sleeves 95 each have a flanged portion forming sprocket teeth l0| adapted to be engaged and turned by one or the other of a pair of chains I02 which are secured so as to operate together by a bar I03 which has a pin I44 secured to a piston rod I05 which is reciprocable. and the ends thereof will move in cylinders I05 and I01 in a manner to be more fully explained hereinafter.

A plurality, four in number, of idler sprockets. I03 (Fig. 21) are mounted on each cylinder head block 15 b a stem I39 which is pivotable in a bearing stud H0 suitably secured in block 13 and provided with a lock nut H I. It will thus be seen that when piston rod I35 is pushed to the rig-ht or left, as seen in Fig. 19, chains I02 will be pulled, turning sprockets I03 and sleeve 95, which will be raised or lowered in collar 95, thus increasing or decreasing the distance push rod 93 can be pushed down because of the engagement of shoulder '94 with sleeve 95 thereby limiting the rocking move ment of rocker arm 33 and withit valve sleeve 0 80, whereby to increase or decrease the maximum opening of the exhaust space provided by annular portions BI and valve seat 19.

Piston I05 and cylinders I05 and I01 comprise a hydraulic motor control device H2, to be more fully described hereinafter.

Valve housing 34 has a cylindrical portion H4 provided with packing rings H5 for the bore of valve sleeve 30 which, as stated above, is re ciprocable externally of portion H4. A bore H5 extends vertically through housing 34 and has an annular enlargement or chamber H1. A flange member or spray nozzle H3 extends upwardly in the lower portion of bore H5 and is secured by a threaded cap H9 and the flanged portion of member H3 seats against the lower face of cylinder portion I I4 which is provided with a spiral groove I (Fig. '7) 0 An injection bomb member I is threadedly secured to member I I3 and cylindrical in form but spaced by a space I22 from the inner wall of valve sleeve 80 which space forms, a. clearance or bleed oil passage for operation of the exhaust valve" sleeve.

A fuel inlet pipe I24 is connected into each inlet valve housing 34 and into chamber H1 and an outlet pipe I25 is similarly connected, which pipe I25 connects to the inlet pipe I 24 of the next cylinder such that a supply of inlet fuel is provided in all of chambers H1 at sumtantially the same pressure.

Cap member H9 is seen to be spaced from the walls of bore H3 such that fuel from chamber H1 may enter chamber H5, and a fuel inlet opening I23 is provided in the top of cap H9.

Flange member H3 is provided with a bore I21 extending downwardly in the upper portion thereof and a plurality of diagonal bores I23 extend from bore I21 into a chamber I in bomb member I2I. A check valve member I3I is pro? vided with a bore which is guided on aboss extending downwardly from member H3 and is provided with a plurality of side ports I32 and a bottom port I33 and contains an injection release valve I34, which, when seated, closes ports I32 and I33, and valve I3I closes a port I in the bottom of bomb member I2I. Valve I34 is anseated by knocker pin 59 on piston member 4|. A bore or passage I35 extends diagonally through member I I8 and communicates between the inner end of spiral passage I20 and the interior of check valve member I3 I.

A needle valve housing member I31 is threadedly positioned in the top of bore H3 and secured thereon by a lock nut I33, and a needle valve stem I39, secured by a lock nut I40, extends downwardly in a bore I in member I31. A compensating bellows element I42 is secured on member I31 and a needle valve I extends downwardly therefrom and controls fuel inlet opening I23, a ball check valve I43 being positioned within cap member I I3 and adapted to close bore I21. A passage I44 extends laterally in housing I31 and communicates with bore HI and has an external pipe connection I45 as will be more fully explained hereinafter. Pipe I45 connects through a fitting and passage in cylinder. head block 15 and the top of cylinder 40 such that combustion characteristics are transmitted to the interior of bellows I42 as controlled by needle valve I39.

Oil and fuel are supplied to the engine under pressure supplied by a duplex pump I41 to which are connected a fuel inlet pipe I43 from any suitable reservoir and a fuel pressure supply pipe I49 which is connected to the inlet pipe I24 of inlet valve housing 34 ofthe end cylinder. A lubricating oil inlet pipe I50 is connected to pump I41 from a suitable reservoir or supply of lubricating oil, and a lubricating pressure supply pipe I5I is connected from pump I41 to front bearings 32 of crank shaft 33 andoil isthereafter forced through the crank shaft for lubrication of all of the bearings in conventional manner, the bearings being sealed to prevent oil spray to the air passing therethrough. A lubricating oil pressure pipe I52 is connected by a T connection from pipe I5I to a cross head metering device I53 and thence through a lubricating line header I54 to the pre-compression and working cylinders for lubricating the rings of the pistons.

As stated hereinabove each inlet valve housing has an outlet pipe I25 connected to the inlet pipe I24 of the next adjacent cylinder valve housing,

and the end cylinder valvehousing. Outlet pipe I25 is connected by a pipe I55 to a fuel injection pressure regulator I53 (Fig. 26) which has an outlet pipe connection I51 which connects to a T fitting I53 from which a Pipe I59 leads to a hydraulic motor control regulator I50 (Figs. 27 and 28) having an inlet port IN. A pipe I52 is connected between a port I53 of regulator I50 and cylinder I03 of a hydraulic motor control device 'I I2. A pipe I01a leads from T fitting I53 to cylinder I01 of control devicel I2.

A pipe I34 leads from a port I55 in regulator I50 to the main fuel storage means. A. pipe I55 leads from a port I51 to the fuel supply or drip means or reservoir. A pipe I53 is connected to a fitting I59 on the top ofregulator I50 and communicates with a supercharge pressure bellows no therein. Pipe I33 connects the bellows with a supercharge pressure dampening valve I (Fig.

'stem I13 provided with a knurled head by which the needle valve may be adjusted to vary the amount of the valve orifice opening.

I show a gauge I15 positioned on wall 44 for reading the supercharge pressure in chamber 45, and I further show a gauge I13 on wall 45 and connected with, and adapted to, indicate the pressure of lubricating pressure line I52 or I54. Bellows I10 has a piston portion I11 within a sleeve I13 which has a semi-circular port I19 communicating with port I3I and pipe I59 such that the movement of piston I11 due to varying pressure in bellows I10 varies the port opening I19 and controls the pressure in pipes I51 and I31a and cylinder I05, sleeve I13 having port openings communicating with ports I53 and I31, respectively, as may be seen in Fig. 29 which. shows a modified form of regulator, the modifications,

however, relating to other features. Sleeve I18 is open at the :bottom which opening communicates with port I85 and is controlled by a valve I80 seated on a spring I8I, the pressure of which may be controlled and varied by an adjusting screw I82 extending through the bottom of the regulator housing.

In Fig. 29 I show a modified form of regulator ISIla in which the valve is designated ltlla and includes a stem I83 adapted to engage the end of piston I'Ii. A stem we extends through a bushing I85 in regulator housing ifilia. A spring I8Ia seats between bushing I85 and valve IBM. A pipe I86 connects with the lubricating pressure line II and the bore of bushing H85 such that the pressure in pipe I85, it above equilibrium, will seat valve I8ta against sleeve I18 and close off communication with port I65 and pipe I 64, however, if this pressure is low, valve I800; will open. The inlet to regulator I56 is preceded by valve I81 seated by spring I88, which in turn is seated on an adjustable stem member I89 by which the fuel injection pressure may be controlled and varied manually.

In Fig. 23 I show a hydraulic speed determinator or centrifugal unloader its which is mounted on the .rear end of crank shaft 33, and includes a tubular portion iiii having peripheral passages which connect with an outlet pipe connection I92 in a fixed portion of the unloader housing. Tubular portion Iti has a pluralit of apertures I93 forming valve seats for ball valves I94, and an annular recess external to tubular portion I9I communicates with a passage i535 running through the crank shaft, receiving oil supplied therethrough from supply pipe 656. which passes through unloader iQEi leaves through outlet I92 and a pipe itfi and returns to the oil supply or sump.

In the operation of the engine air enters at the top through inlet manifold or air chamber housing 50 and passes over and around the tops of cylinder head blocks I 5 and downwardly through duct 48 into air inlet chamber M. This fresh cool air performs a cooling function for the cyl inder heads and fuel inlet parts thereon. This air from chamber ii then enters precompression chamber 5i through ports 56 during the upstroke, valves 55 being unseated during this movement. When the cross head piston 35 is at its lowermost position air in chamber 5i is partially compressed and a portion or it moves up around and above piston 35 and supplements th volume of air present in cylinder 36 and is ultimately forced through ports I i into supercharge receiver 45.

When the pistons move downwardly the air trapped in crank case chamber M is compressed to approximately thirty pounds per square inch, which pressure is transmitted into supercharge receiver 45.

At the end of the downward stroke pins iii on upper piston 60 move annular valve it to close ports I4 and open ports I5, and air from supercharge receiver 45 moves into upper cylinder Mi until a suificient pressure has been developed in lower cylinder 36 to move annular valve I3 up to close ports '15. On the downward stroke the supercharged air under piston 58 is then moved up through passages 65 and past valves 66 above piston 4| when cylinder ill has exhausted below the supercharged pressure below piston tit.

Some of the air drawn into pre-compression chamber 5i during the suction stroke of pistons 35 and ti moves up through bore in piston Oil.-

[ill

rod 42, past check valve 83 therein, and through ports 64 and downwardly through passages 85 andports I5 into super-charging chamber 45, it being understood that the combustion pressure above piston member 4| holds valves 68 closed during this movement. When the pistons approach or reach bottom stroke the combustion pressure in cylinder 40 becomes less than the super-charge pressure below valves 66, whereupon said valves are raised from their seats and permit this super-charged air to enter cylinder 40 above piston 4| by passing through ports 88 in annular valve plate member 61, and by virtue of the inclined formation of ports 68 the turbulence of flow follows an orderly centrifugal pattern. This highly induced turbulence, at the rate of eleven hundred feet per second, actually has time and momentum to make approximately one hundred full turns after the fuel has been introduced into the cylinder, when operating at twenty-four hundred R. P. M., thus providing for complete combustion by insuring complete mixing of the fuel and the products of explosion after leaving the bomb chamber I2I. At the bottom stroke pins III on annulus, S9 engage annular valve 73, opening port 15 to the supercharge chamber 45 and closing ports 14 to cylinder 36. During the period valves 66 .are open the inlet air moving into cylinder 40 forces the exhaust gases upwardly in the cylinder and out through exhaust ports I8, and thence through exhaust manifold 53 to'the atmosphere, exhaust sleeve valve 8% being permitted to open under the positive cylinder pressure by the action of rocker arm 83, push rod 93 and cam98.

Due to the high velocity of the exhaust gas discharge, due to a pressure of about thirty pounds per square inch, the exhaust functionis per formed very quickly and may be, accomplished through a small opening of valve 80. The how of air then continues, for the approximately through the exhaust passages, thereby'puttingQ all the hot surfaces of the internal combustion engine in direct contact with air which acts as a cooling medium for those parts. On the completion of this function the exhaust valve is closed mechanically by the operation of cam 98, however, the flow of air from the super-charging chamber continues past valves 66, thereby creating an elevated or super-charged pressure within the cylinder before the piston has had sufficient time to appreciably function as a compressor. This novel method of super-charging along with the positive displacement source of super-charge pressure offers new means of application to an unlimited super-charge pressure in designs of greater extremes, making possible engines having specific weight of four or five horse-power per pound and possibly even more.

The super-charge pressure is preferably designated by a valve opening of either varying area or varying time duration. This is explained by virtue of the fact that the engine is displacing a fixed volume of air at each revolution, and unless the air is more restricted at lower speeds than at higher speeds, this fixed volume would have more time to travel through, and consequently would be greatly reduced in pressure.

Exhaust valve and injection bomb chamber iii combine to perform this function through the application of variable area. This variable area is provided by the amount valve 80 is per- 9 mitted to open, its opening being accelerated by the pressure in the cylinder at cut-off. The vertical position of sleeve 96 determines the throw of push rod 33 and therefore the amountvalve 60 is permitted to open, the position of sleeve 55 being determined by the hydraulic differential or equilibrium, whichever is the case, in the hydraulic motor control device II2. It will be realized that due to the high pressures within the working cylinder, positive means must be provided to insure valve 80 seating firmly on valve seat 15, and this is accomplished by the deflection of springs 66 which support the rocker arm shaft 81. The deflection of these springs is very small with respect to the travel of the valve sleeve 80, therefore, on the closing lobe of the cam the resistance of these springs does not become a factor until the valve is actually closed and the cam is within .008" of its ultimate rise. This final .008" rise should be very gradual because the effort to overcome the spr oa Will crease in direct proportion to the increasing cylinder pressure throughout the compression stroke.

Fuel is admitted to inlet housing 84 of each cylinder of the engine, as set forth hereinabove, and a supply of fuel is maintained under pressure in chamber 1. Fuel from chamber II'I passes upwardly around cap I I9 and is admitted through port I26 into bore I21, past needle valve I46 in an amount determined by the pressure present in bellows I42 acting on needle valve I46 which restricts flow past orifice I26. The fuel is then admitted through passages I28 into bomb chamber I30 which operates at an exceedingly high temperature because of its isolation from cool areas, and the fuel in the chamber is ignited by this temperature along with heat of adiabatically compressed air being forced into the chamber sometime during the compression stroke, and creates a high pressure therein since valves I3I and I34 are seated and closed. Upon the piston reaching top stroke, knocker pin 59 unseats valve I3I and permits the pre-ignited fuel, under its high pressure within chamber I30, to pass through port I35 being deflected generally into the combustion chamber, and exert its pressure upon mixing and igniting with the combustion chamber air in cylinder 40 to be expended on piston 4|, thus providing the work stroke of the engine. Upon completion of combustion, valve I34 is closed by connection with bore I28 when a component of the compression pressure which passes through passage I35 forces check valve member I3I upward when new air charge is being supplied to bomb chamber I30 during compression stroke prior to combustion. Check valve I34 is held in upper position against the extension portion of flange member II8 due to the long spiral bleed off passage I20 which is under a reduced pressure during a portion of the downward stroke and is under an increased pressure at the start of the compression stroke. Valve I34 moves downwardly with valve member I3I, thus closing port I35, due to high pressure within chamber I30.

It will thus be seen that combustion does not occur in cylinder 40 until top stroke and the mechanical opening of valve I34 and, therefore,

there is no loss of efliciency due to pre-combustion within cylinder 40 before top stroke due to varying conditions of fuel, atmosphere, etc., which occur in other types of engine depending entirely upon cylinder pressure compression ignition necessitating early fuel injection. In the engine comprising this invention, pre-combustion is definitely provided for within bomb chamber I30 permitting a conditioning of fuel by high temperature and pre-combustion gasiflcation for a, long comparative time although isolating it within the bomb chamber until. the mechanical criterion of opening valve I34 hasbeen accomplished. There is therefore a positive control over actual fuel injection into the working cylinder at all times free from influence of the uncertain and variable period of pre-combustion which occurs in cylinders of this type when the fuel is admitted directly into the working cylinder, and are attended by severe ignition lag which interferes with accomplishing a constant pressure cycle.

Inasmuch as the time of beginning of effective injection of the fuel is positive, the rate of injection may thereupon be controlled by restriction of the fuel inlet which is controlled by needle valve I46, the position of which is controlled and determined by the average effective pressure in cylinder 40 transmitted by pipe I45 into bore I, the effect of which pressure within bellows I42, and therefore on needle valve I46, may be influenced by the amount of the discharge opening of bore I which is regulated manually by needle valve stem member I39 in order to balance fuel energy between cylinders.

The fuel injection is further influenced by the effective fuel pressure in chamber 1, which pressure is controlled by the fuel pressure regulator device I56 (Fig. 26) in which,.as explained hereinabove, the return fuel flow from the end cylinder pipe I25 is restricted by the permitted spring pressure on valve I81 which can be controlled manually. There is thus a differential control on the fuel injection, both from the effective pressure in cylinder 40 and the fuel pressure in chamber 1, and the differential of these pressures, effective at needle valve I46 determines or varies the fuel injection according to variations in load or speed of the engine.

The hydraulic motor control regulator I60 also performs an isochronous regulation with respect to the varying hydraulic differentials. The fuel flow after it has passed the fuel pressure and engine load control (fuel pressure minimum approximately 100 pounds), passes through pipe I59 and escapes through a continuing by-pass valve I through pipe I64 to the main fuel storage means. This pressure once determined remains constant and is common to the hydraulic control motor II2, pipe I62 and cylinder I06, and exerts this continuing pressure on piston I05. Bellows II0, which controls piston I'll, is exerting a force downwardly, or in a port closing position, and is responsive to the pressure in the receiver through pipe I68, and is affected by the super-charge pressure dampening valve I13. If this pressure tends to increase, the regulating plunger will be forced downwardly or in a closing direction by virtue of the fact that the force behind it became greater than the force resisting it. The plunger, however, will continue in motion until an equilibrium has again been obtained. Its downward movement results in restricting the passage from the supply line creating a higher pressure therein which is connected through the T to the other end of the hydraulic control motor regulator. Restriction here could reach an infinite value. For this reason a line with a check valve returning to the inletside of the fuel pressure and engine load control I56 is 15 necessary to preveniythe pressure from rising higher than the injection pressure and resulting in engine acceleration.

This elevated pressure then becomes common through pipe I'Ia, through T fitting I58 to cylinder I01 of the hydraulic control motor II2. This elevated pressure then overbalances the pressure in cylinder I06 on piston I and tends to move the piston to the right, as seen in Fig. 19. Piston I05 is connected with pin I04 on bar I03 to control and move chain I02 and rotate sleeve 95, which as stated exhaust valve 80 to open to a lesser degree, thus restoring an equilibrium in the regulated supercharge pressure of the engine. A similar procedure in the opposite direction will occur upon the super-charge pressure becomingreduced due to changes in the operating requirements of the engine.

As set forth hereinabove in the specific de scription of the engine construction, increased emciency is achieved by the intake air which passes over, around and through the parts subjected to the highest temperatures, which air is, itself, acting as a cooling medium an amount which contributes to the simplicity of design and ability to control the temperature of internal hot parts under increased heat of combustion due to super-charging, thus permitting higher overall operating temperatures with attending high eiilciency due to better temperature control of critical parts. Further efilciency is accomplished by carburetion of water to a vapor which is admitted to the intake air by a substantially conventional carburetor, it being known that more eflicient combustion occurs when the intake air contains a percentage of moisture or water vapor. This function also contributes to the efficiency of the cooling by a more rapid absorption of heat from the hot engine parts, and the intake air has a higher specific heat with an increase in its vapor content.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In an internal combustion engine having a working cylinder having a piston and inlet and exhaust valve means, in combination, a fuel in- Jection structure comprising a cylinder head having a chamber for fuel supplied under pressure and a passage from said chamber to said cylinder, 9. fuel inlet control valve for said passage, and a cylinder inlet control valve in said passage adapted to be actuated by said piston, said fuel inlet control valve adapted to be responsive to the effective pressure in said cylinder.

2. In an internal combustion engine having a working cylinder having a piston and inlet and exhaust valve means, in combination, a fuel injection structure comprising a cylinder head having a chamber for fuel supplied under pressure and a passage from said chamber to said cylinder, a fuel inlet control valve for said passage, and a cylinder inlet control valve in said passage adapted to be actuated by said piston, said fuel inlet control valve adapted to be responsive to a manually predetermined component of the effective pressure in said cylinder.

3. In an internal combustion engine having a working cylinderhaving a piston and inlet and exhaust valve means, in combination, a fuel injection structure comprising a cylinder head having a chamber for fuel supplied under pres-' sure and a passage from said chamber to said cylinder, 9. fuel inlet control valve for said pasabove, permits the sure and a passage from said chamber to said cylinder, a bellows in said chamber, a fuel inlet control valve for said passage mounted on said bellows, and a cylinder inlet control valve in said passage adapted to be actuated by said piston, said fuel inlet control valve adapted to be responsive to the effective pressure in said cylinder. I

5. In an internal combustion engine having a working cylinder having a piston and inlet and exhaust valve means, in combination, a fuel injection structure comprising a cylinder head having a chamber for fuel supplied under pressure and a passage from said chamber to said cylinder, a bellows in said chamber, a fuel inlet control valve for said passage mounted on said bellows, and a cylinder inlet control valve in said passage adapted to be actuated by said piston, said fuel inlet control valve adapted to be responsive to the fuel pressure in said chamber.

6. In an internal combustion engine having a working cylinder having a piston and inlet and exhaust valve means, in combination, a fuel injection structure comprising a cylinder head having a chamber for fuel supplied under pressure and a passage from said chamber to said cylinder, a bellows in said chamber, a passage communicating between the interior of said bellows and said cylinder, a fuel inlet control valve for said passage mounted on said bellows, and a cylinder inlet control valve in said passage adapted to be actuated by said piston, said fuel inlet control valve adapted to be differentially responsive to the effective pressure in said cylinder and the fuel pressure in said chamber.

7. In an internal combustion engine having a working cylinder having a piston and inlet and exhaust valve means, in combination, a fuel injection structure comprising a cylinder head having a chamber for fuel supplied under pressure, an injection bomb having a chamber and a passage therefrom to said cylinder head chamber and a port between said injection bomb chamber and said cylinder, a fuel inlet control valve for said passage, and a control valve for said port adapted to be actuated by said piston.

8. In an internal combustion engine having a working cylinder having a piston and inlet and exhaust valve means, in combination, a fuel injection structure comprising a cylinder head having a chamber for fuel supplied under pressure, an injection bomb having a chamber and a passage therefrom to said cylinder head chamber and a port between said injection bomb chamber and said cylinder, 9, fuel inlet control valve for said passage, a control valve for said port adapted to be opened by said piston, and means to close said control valve.

9. In an internal combustion engine having a working cylinder having a piston and inlet and exhaust valve means, in combination, a fuel injection structure comprising a cylinder head having a chamber for fuel supplied under pressure, an injection bomb having a pre-combustion chamber and a passage therefrom to said cylinder head chamber and a port between said pre-combustion chamber and said cylinder, a fuel inlet control valve for said passage, a control valve for said port adapted to be opened by said piston and having a tubular guide, and means to close said control valve including a passage from within said guide to said cylinder.

10. In an internal combustion engine having a working cylinder having a piston and inlet and exhaust valve means, in combination, a fuel injection structure comprising a cylinder head having a chamber for fuel supplied under pressure, an injection bomb having a pre-combustion chamber and a passage therefrom to said cylinder head chamber and a port between said pro-combustion chamber and said cylinder, a fuel inlet control valve for said passage, a control valve for said port adapted to be opened by said piston and having a tubular guide, and means to close said control valve including a spiral passage from within said guide to said cylinder.

11. A control system for an internal combustion engine including air compression means, fuel supply means and an exhaust valve, said system comprising means operable to control the degree of opening of said exhaust valve, and means responsive to pressure in said air compression means operable to actuate said control means.

12. A control system for an internal combustion engine including air compression means, fuel supply means and an exhaust valve, said system comprising mechanical means operable to control the degree of opening of said exhaust valve, and hydraulic means operable to actuate said mechanical means, said hydraulic means being responsive to pressure in said air compression means.

13. A control system for an internal combustion engine including air compression means, fuel supply means and an exhaust valve, said system comprising mechanical means operable to control the degree of opening of said exhaust valve, hydraulic means operable to actuate said mechanical means, and pressure regulating means responsive to pressure in said air compression means and operable to regulate said hydraulic means.

14. A control system for an internal combustion engine including fuel supply means, air compression means and an exhaust valve, said control system comprising a valve having a fuel inlet port communicating with said fuel supply means and a fuel outlet port, said valve being responsive to pressure in said air compression means to determine the pressure differential between said inlet and outlet ports, hydraulic means operable to control the degree of opening of said exhaust valve, said hydraulic means including a double acting piston, means communicating fuel pressure at said inlet port to one end of said piston and means communicating fuel pressure at said outlet port to the other end of said piston.

15. A valve structure comprising a valve body having an inlet port and an outlet port, a reciprocable valve member disposed in said body for reciprocation between a first, open position and a second, closed position opening and closing communication, respectively, between said ports, and resilient means urging said valve member to one of said positions, said valve body also having a port adapted to communicate with a source of fluid pressure to urge said valve member to the opposite position.

16. The valve structure of claim 15, wherein said resilient means comprises a bellows in com munication with said last-mentioned port and Ill supporting said valve member for reciprocation within said valve body.

1'7. A valve structure comprising a valve body having an inlet port, a first outlet port and a second outlet port, a valve regulating communi cation between said inlet port and said first outlet port, a, valve member reciprocable within said valve body to constrict or augment communication between said inlet port and said second outlet port, and resilient means supporting said valve member and urging the same to a position augmenting such communication, said valve body having a port adapted to communicate a source of fluid pressure with said valve member to urge the same in opposition to said resilient means.

18. The valve structure of claim 17, wherein said regulating valve is manually adjustable.

19. The valve structure of claim 17, wherein said regulating valve is reciprocable within said valve body, is provided with resilient means urging it to valve closing position and is further provided with a, duct adapted to communicate a source of fluid pressure to said regulating valve in opposition to said resilient means.

20. A valve structure comprising a valve body having an inlet port, a first outlet port and a second outlet port, a valve member reciprocable within said valve body, bellows supporting said valve member for reciprocation toward and away from a position closing communication between said inlet port and said second outlet port, said bellows resiliently urging said valve member in the opposite direction to maintain open communication between said inlet port and second outlet port, a valve seat disposed between said inlet port and said first outlet port, a spring loaded valve adapted to seat on said valve seat and having a stem reciprocable within said valve body and biased toward valve seating position, said valve body being provided with a duct adapted to communicate said bellows with a source of fluid pressure and being further provided with another duct adapted to communicate said valve stem with a source of fluid pressure.

21. A hydraulic control system for an internal combustion engine, comprising a hydraulic unit including a double acting piston and means for communicating fluid pressure to each end of said piston, and a, valve structure including an inlet port, an outlet port, a reciprocable valve member disposed within said structure and reciprocable to and from a position closing communication between said ports, and a third port adapted to communicate a source of fluid pressure with said valve member to urge the same to said position.

22. The system of claim 21, including a duct communicatingsaid inlet port with one end of said piston and another duct communicating said outlet port with the other end of said piston, whereby the position of said piston is determined by the pressure difierential between said inlet and outlet ports.

23. A system for regulating an internal combustion engine, said engine comprising a working cylinder, 9. piston reciprocable therein, fuel supply means and an exhaust valve, said system comprising means for compressing air to be delivered to said cylinder, a chamber adapted to serve as a reservoir for air thus compressed, means for opening and closing said exhaust valve, an adjustable stop member determining the degree of opening of said exhaust valve, an hydraulic unit including a double acting iston operatively connected to said stop member to adjust the same,

18 a valve structure including an inlet port and an outlet port, a fuel line communicating said fuel supply means with said inlet port, another fuel line communicating said fuel supply means with one end of said piston, a third fuel line communi- 5 eating said outlet port with the other end of said piston, and a reciprocable valve member dis= posed within said valve structure, in communication with said chamber and operable by the diilerential between the fuel pressure at said inlet port and the air pressure exerted on said valve member, to establish a pressure diflerential between said inlet and outlet ports and thereby determine the position of said piston, the position 01' said stop member and the degree or openus ing of said exhaust valve.

CARL B. SUES.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PAEFENTS Number Name Date 1,013,955 Roberts Jan. 9, 1912 1,085,233 Ahlberg Jan. 27, 1914 1,141,013 Schwarz May 25, 1915 1,413,419 Moss Apr. 18, 1922 2,274,683 Fraser Mar. 3, 1942 FOREIGN PATENTS Number Country Date 771,494 France 1934 

